Unexpected symbol

Eu fiz o script todo certo mas esta dando um erro que não entendo como arrumar me ajudem ai galera

I made sure every script but is giving an error I do not understand how to fix help me there guys

using UnityEngine; using System.Collections;

public enum POSITION_PLAYER { LEFT, RIGHT, MIDDLE }

public class PlayerBehaviour : MonoBehaviour {

 public Vector3 positionLeft;
 public Vector3 positionRight;
 public Vector3 positionMiddle;

 public POSITION_PLAYER currentPosition = POSITION_PLAYER.MIDDLE;

 private Vector3 positionToGo;

 public float dumbToPosition;

 // Use this for initialization
 void Start () {
 
 }
 
 // Update is called once per frame
 void Update () {
     InputPlayer ();

 transform.position = Vector3.Lerp (transform.position, positionToGo, Time.deltaTime * dumbToPosition);
 
 }

 public void changePosition(POSITION_PLAYER = nextPosition) {

 if (nextPosition == POSITION_PLAYER.LEFT && currenPosition == POSITION_PLAYER.RIGHT){
         currentPosition = POSITION_PLAYER.MIDDLE;
 }
     else if (nextPosition == POSITION_PLAYER.LEFT && currenPosition == POSITION_PLAYER.MIDDLE){
         currentPosition = POSITION_PLAYER.LEFT;
 }
     else if (nextPosition == POSITION_PLAYER.RIGHT && currenPosition == POSITION_PLAYER.LEFT){
         currentPosition = POSITION_PLAYER.MIDDLE;
 }
     else if (nextPosition == POSITION_PLAYER.RIGHT && currenPosition == POSITION_PLAYER.MIDDLE){
         currentPosition = POSITION_PLAYER.RIGHT;
 }

     

 switch (currentPosition) {
 case POSITION_PLAYER.LEFT; {
         positionToGo = positionLeft;
         break;
     }
 case POSITION_PLAYER.RIGHT; {
         positionToGo = positionRight;
         break;
     }
 case POSITION_PLAYER.MIDDLE; {
         positionToGo = positionMiddle;
         break;
     }
     }
 }

public void InputPlayer(){ if(Input.GetAxis("Horizontal") > 0) { changePosition(POSITION_PLAYER.RIGHT); }else { changePosition(POSITION_PLAYER.LEFT); } }

}